Question

A certain candy bar costs P85.00 per piece. However, if you buy more than 20
pieces, they will be marked down to a price of P80.00 per piece. Use a piecewise
function to represent the cost in terms of the number of chocolate bars bought.​

Answer 1

Given : A certain candy bar costs P85.00 per piece. However, if you buy more than 20  pieces, they will be marked down to a price of P80.00 per piece  

To Find :  a piecewise  function to represent the cost in terms of the number of chocolate bars bought.​

Solution:

A certain candy bar costs P85.00 per piece.

x = number of chocolate bars bought.​

f(x) = Cost

f(x)  = 85x   0 <  x  ≤ 20

buy more than 20  pieces, they will be marked down to a price of P80.00 per piece.

f(x) = 80x     20 < x

Piece wise function :

$f(x)= \left \{ {{85x \quad 0<x<\leq20} \atop {80x \quad 20 < x \quad ~~}} \right$

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